Aminohydroxynaphthalenesulphonic acids and their salts
Oxygen-function amino-compounds. > Amino-naphthols and other amino-phenols, other than those containing more than one kind of oxygen function, their ethers and esters; salts thereof: > Aminohydroxynaphthalenesulphonic acids and their salts > Aminohydroxynaphthalenesulphonic acids and their salts
Duty Rate (from China)
Products classified under Tariff item 2922.21.00
1-Amino-8-hydroxy-3,6-naphthalenedisulfonic acid
1-Amino-8-hydroxy-3,6-naphthalenedisulfonic acid is a separate chemically defined organic compound with amino, hydroxy, and sulfonic acid groups on a naphthalene ring. It is a diazo coupling component used in the synthesis of acid dyes, falling under tariff item 2922.21.00 as an aminohydroxynaphthalenesulphonic acid.
1-Naphthylamine-4-sulfonic Acid (Naphthionic Acid)
Naphthionic Acid (1-Naphthylamine-4-sulfonic Acid) is an aminohydroxynaphthalenesulfonic acid derivative used in azo dye synthesis and pharmaceutical intermediates. Its structure includes amino and sulfonic acid groups on naphthalene with oxygen-function, placing it under tariff item 2922.21.00. The compound is a separate chemically defined organic compound per Chapter 29 Note 1(a).
4-Amino-3-hydroxy-1-naphthalenesulfonic acid
4-Amino-3-hydroxy-1-naphthalenesulfonic acid is a chemically defined aminohydroxynaphthalenesulphonic acid with amino, hydroxy, and sulfonic groups. It is used as a building block for direct and metal complex dyes, and falls under tariff item 2922.21.00.
6-Amino-1-naphthol-3-sulfonic acid (J Acid)
6-Amino-1-naphthol-3-sulfonic acid (J Acid) is an aminohydroxynaphthalenesulphonic acid used as an intermediate for direct and reactive dyes. It is a separate chemically defined compound, falling under tariff item 2922.21.00.
8-Amino-1-naphthol-5-sulfonic acid (Schaeffer's acid)
8-Amino-1-naphthol-5-sulfonic acid (Schaeffer's acid) is an aminohydroxynaphthalenesulphonic acid used as a dye intermediate for acid wool and reactive dyes. It is a separate chemically defined compound, classified under tariff item 2922.21.00.
Bayer's Acid Salt (1-Naphthylamine-4-sulfonic Acid Sodium Salt)
Bayer's Acid Salt (1-Naphthylamine-4-sulfonic Acid Sodium Salt) is a chemically defined organic compound used as an intermediate in the production of direct and reactive dyes. Its aminohydroxynaphthalenesulfonic acid structure places it under tariff item 2922.21.00, which covers such acids and their salts. The sodium salt form is included as a salt of the acid.
CAS 117-94-2 1-Amino-8-Naphthol-4,6-Disulfonic Acid Monosodium Salt
CAS 117-94-2 is the monosodium salt of 1-amino-8-hydroxy-4,6-naphthalenedisulfonic acid, a separate chemically defined compound. It is an aminohydroxynaphthalenesulphonic acid salt, classified under tariff item 2922.21.00.
Chicago Acid (4-Amino-5-hydroxy-1,3-naphthalenedisulfonic acid)
Chicago Acid (4-amino-5-hydroxy-1,3-naphthalenedisulfonic acid) is a separate chemically defined compound with amino, hydroxy, and two sulfonic acid groups. It is an intermediate for reactive dyes and azo pigments, classified under tariff item 2922.21.00.
Chicago Acid Sodium Salt
Chicago Acid Sodium Salt is the sodium salt of 4-amino-5-hydroxy-1,3-naphthalenedisulfonic acid. As a salt of an aminohydroxynaphthalenesulphonic acid, it is classified under tariff item 2922.21.00, consistent with chapter note 5(C)(1) which classifies inorganic salts with the organic compound.
Dye Coupler H Salt Monosodium 1-Amino-8-OH-4,6-NDS
Dye Coupler H Salt Monosodium is the monosodium salt of 1-amino-8-hydroxy-4,6-naphthalenedisulfonic acid. It is a separate chemically defined aminohydroxynaphthalenesulphonic acid salt, falling under tariff item 2922.21.00.
Gamma Acid (2-Amino-8-naphthol-6-sulfonic Acid)
Gamma Acid (2-Amino-8-naphthol-6-sulfonic Acid) is a dye coupler with amino, naphthol, and sulfonic acid groups, used in acid and direct dyes. As a pure organic compound with oxygen-function amino groups, it aligns with Chapter 29 scope and falls under tariff item 2922.21.00. It is a separate chemically defined organic compound per Chapter 29 Note 1(a).
Gamma Acid (6-Amino-1-naphthol-3-sulfonic acid salt)
Gamma Acid (6-amino-1-naphthol-3-sulfonic acid) and its salts are aminohydroxynaphthalenesulphonic acids used in the naphthol AS dye series. They are separate chemically defined compounds or salts, falling under tariff item 2922.21.00.
H Acid Free Acid (4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid)
H Acid Free Acid (4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid) is a separate chemically defined aminohydroxynaphthalenesulphonic acid. It is used in dye coupling reactions and is classified under tariff item 2922.21.00.
H Acid Monopotassium Salt
H Acid Monopotassium Salt is the monopotassium salt of 4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid. As a salt of an aminohydroxynaphthalenesulphonic acid, it falls under tariff item 2922.21.00, with classification following the organic compound per chapter note 5(C)(1).
H-Acid Monosodium Salt (1-Amino-8-Hydroxy-4,6-NDS)
H-Acid Monosodium Salt (1-amino-8-hydroxy-4,6-NDS) is a key dye coupler intermediate. It is the monosodium salt of an aminohydroxynaphthalenesulphonic acid, classified under tariff item 2922.21.00.
H Acid Monosodium Salt (4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid, monosodium salt)
H Acid Monosodium Salt (4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid, monosodium salt) is a key dye intermediate. It is a salt of an aminohydroxynaphthalenesulphonic acid, classified under tariff item 2922.21.00.
J Acid (2-Naphthylamine-7-sulfonic Acid)
J Acid (2-Naphthylamine-7-sulfonic Acid) is an aminonaphtholsulfonic acid serving as an intermediate for azo dyes and pigments. It contains the requisite amino, hydroxy (via naphthol), and sulfonic functions on naphthalene, placing it under tariff item 2922.21.00. The compound is a separate chemically defined organic compound per Chapter 29 Note 1(a).
K Acid (1-Naphthylamine-8-sulfonic Acid)
K Acid (1-Naphthylamine-8-sulfonic Acid) acts as a dye intermediate with amino and sulfonic groups on a naphthalene structure. It meets the definition of an oxygen-function amino-compound under Chapter 29 notes, placing it under tariff item 2922.21.00. The compound is a separate chemically defined organic compound per Chapter 29 Note 1(a).
K-acid (4-Amino-5-hydroxynaphthalene-2,7-disulfonic Acid)
K-acid (4-Amino-5-hydroxynaphthalene-2,7-disulfonic Acid) is a chemically defined organic compound with multiple sulfonic groups, enhancing water solubility for use as a coupling component in substantive dyes. Its structure as an aminohydroxynaphthalenesulphonic acid places it under tariff item 2922.21.00. The compound is a separate chemically defined organic compound per Chapter 29 Note 1(a).
Laurent's Acid (2-Naphthylamine-3,6-disulfonic Acid)
Laurent's Acid (2-Naphthylamine-3,6-disulfonic Acid) is a di-sulfonic derivative of 2-naphthylamine, used as a dye coupler in textile coloration. Despite having two sulfonic groups, it is classified under tariff item 2922.21.00 as an aminohydroxynaphthalenesulphonic acid. It is a separate chemically defined organic compound per Chapter 29 Note 1(a).
M Acid (1-Naphthylamine-5-sulfonic Acid)
M Acid (1-Naphthylamine-5-sulfonic Acid) provides amino-hydroxy-sulfonic functionality for the naphthol AS dye series. It is a chemically defined compound per Chapter 29 Note 1(a), with oxygen-function amino characteristics, placing it under tariff item 2922.21.00. The compound is a separate chemically defined organic compound.
Monosodium 1-Amino-8-hydroxy-4,6-naphthalenedisulfonate
Monosodium 1-amino-8-hydroxy-4,6-naphthalenedisulfonate is the monosodium salt of an aminohydroxynaphthalenesulphonic acid. It is a separate chemically defined compound, falling under tariff item 2922.21.00.
Neville-Winter Acid (1-Naphthylamine-5-sulfonic Acid)
Neville-Winter Acid (1-Naphthylamine-5-sulfonic Acid) is an aminohydroxynaphthalenesulfonic acid used in acid dye manufacturing. Its structure with amino and sulfonic groups on naphthalene places it under tariff item 2922.21.00. The compound is a separate chemically defined organic compound per Chapter 29 Note 1(a).
Schaeffer's Acid (2-Naphthylamine-6-sulfonic acid)
Schaeffer's Acid (2-Naphthylamine-6-sulfonic acid) is an aminohydroxynaphthalenesulfonic acid used primarily as an intermediate in the production of azo dyes and pharmaceuticals. It features an amino group, hydroxyl group, and sulfonic acid group attached to naphthalene, placing it under tariff item 2922.21.00. The compound is a separate chemically defined organic compound per Chapter 29 Note 1(a).
Schaeffer's Salt (2-Naphthylamine-6-sulfonic Acid)
Schaeffer's Salt (2-Naphthylamine-6-sulfonic Acid) is a sodium salt of 2-naphthylamine-6-sulfonic acid, used as an intermediate in azo dye synthesis. Its aminohydroxynaphthalenesulfonic acid structure places it under tariff item 2922.21.00. The salt form is included as a salt of the acid.
Sodium Salt of 1-Amino-8-naphthol-3,6-disulfonic Acid (H Acid)
H Acid Sodium Salt (Sodium Salt of 1-Amino-8-naphthol-3,6-disulfonic Acid) is a critical coupling component for reactive dyes, featuring amino-hydroxy-disulfonic functions on naphthalene. It meets Chapter 29 criteria for chemically defined amino-oxygen compounds and their salts, placing it under tariff item 2922.21.00. The sodium salt form is included as a salt of the acid.
Technical Grade 1-Amino-8-Hydroxy-4,6-Naphthalenedisulfonic Acid Na Salt
Technical grade 1-amino-8-hydroxy-4,6-naphthalenedisulfonic acid sodium salt is the monosodium salt of an aminohydroxynaphthalenesulphonic acid. It is a separate chemically defined compound with allowed stabilizers, classified under tariff item 2922.21.00.
Tobias Acid (2-Naphthylamine-8-sulfonic Acid)
Tobias Acid (2-Naphthylamine-8-sulfonic Acid) is the sodium salt of 2-naphthylamine-8-sulfonic acid, used as a diazo component in manufacturing acid dyes and pigments. Its aminohydroxynaphthalenesulfonic acid structure places it under tariff item 2922.21.00. The compound is a separate chemically defined organic compound per Chapter 29 Note 1(a).
Tobias Acid (2-Naphthylamine-8-sulfonic acid)
Tobias Acid (2-Naphthylamine-8-sulfonic acid) serves as a key dye intermediate with amino, hydroxy, and sulfonic functionalities on naphthalene, used in acid dyes and optical brighteners. It qualifies as a separate chemically defined organic compound under Chapter 29 Note 1(a), placing it under tariff item 2922.21.00. The compound is a separate chemically defined organic compound.